SRI unit will tune the influence of each region. It deploys scaled self-attention mechanism [1]} (as defined in Eq. REF ). Attention coefficients \({a}\)  considers the human-human interaction features and the human-space interaction features:
\( a = \frac{Softmax (\exp {(\mathcal {F}^{\prime })})}{\Sigma \exp {(\mathcal {F}^{\prime })}}\) 
